Kinetic theory of weak turbulence in magnetized plasmas: Perpendicular propagation
Kinetic theory of weak turbulence in magnetized plasmas: Perpendicular propagation
复制标题
磁化等离子体中弱湍流的动力学理论：垂直传播
DOI：
10.1063/1.4928380
复制
发表时间：
2015
影响因子：
2.2
通讯作者：
P. Yoon
中科院分区：
文献类型：
--
作者：
P. Yoon
本文提出了一种弱湍流理论，其中假设电磁扰动沿垂直于环境磁场的方向传播。通过假设所有波矢都位于与环境磁场垂直的一个方向上，得到了扰动分布函数方程的线性解和二阶非线性解。从二阶非线性的非线性扰动电流推导出一般形式，但冷等离子体温度的限制情况，以获得一个显式的非线性波动力学方程，描述三波衰减/合并之间的相互作用X和Z模式。本形式主义的一个潜在的应用进行了讨论。
The present paper formulates a weak turbulence theory in which electromagnetic perturbations are assumed to propagate in directions perpendicular to the ambient magnetic field. By assuming that all wave vectors lie in one direction transverse to the ambient magnetic field, the linear solution and second-order nonlinear solutions to the equation for the perturbed distribution function are obtained. Nonlinear perturbed current from the second-order nonlinearity is derived in general form, but the limiting situation of cold plasma temperature is taken in order to derive an explicit nonlinear wave kinetic equation that describes three-wave decay/coalescence interactions among X and Z modes. A potential application of the present formalism is also discussed.